e) ko rõ đề
f) 48.19+48.115+134.52=48(19+115)+134.52=48.134+134.52=134.(48+52)=134.100=13400
g) 27.121-87.27+73.34=27(121-87)+73.34=27.34+73.34=34(27+73)=34.100=3400
h) 125.98-125.46-52.25=125(98-46)-52.25=125.52-52.25=52(125-25)=52.100=5200
i) 136.23+136.17-40.36=136(23+17)=136.40-40.36=40(136-36)=40.100=4000
j)ko rõ đề
k) 5.23+35.41+64.65=5.23+35.41+(23+41).65=23(5+65)+41(35+65)=23.70+41.100=4261
l) 29.87-29.23+64.71=29.64+64.71=64(29+71)=6400
m) 19.27+47.81+19.20=19.47+47.81=47(19+81)=4700
n) 87.23+13.93+70.87=87.93+13.93=93(87+13)=9300
